How do we know that Jesus has power over demons?

The New Testament accounts, specifically in Luke 4:41, show Jesus exercising His authority over demons. When commanded by Jesus, the demons had no choice but to obey. This reveals not only Jesus' divine authority but also His identity as the Son of God. His power is absolute, illustrated by how He rebuked the fever of Simon Peter's mother-in-law without any physical touch, but merely with a word. This indicates that no spirit can resist His commands, portraying a clear demonstration of His deity and power.